forked from Minki/linux
c553138fbd
Instead of __raw_*, define imx_* to *_relaxed and use those. Using imx_* was requested by Arnd because *_relaxed tends to indicate that the code was carefully reviewed to not require any synchronisation and otherwise be safe, which isn't the case here with the automatic conversion. The conversion itself was done using the following spatch (since that automatically adjusts the coding style unlike a simple search&replace). @@ expression E1, E2; @@ -__raw_writel(E1, E2) +imx_writel(E1, E2) @@ expression E1, E2; @@ -__raw_writew(E1, E2) +imx_writew(E1, E2) @@ expression E1; @@ -__raw_readl(E1) +imx_readl(E1) @@ expression E1; @@ -__raw_readw(E1) +imx_readw(E1) Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
50 lines
975 B
C
50 lines
975 B
C
/*
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* i.MX27 Power Management Routines
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*
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* Based on Freescale's BSP
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License.
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*/
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#include <linux/kernel.h>
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#include <linux/suspend.h>
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#include <linux/io.h>
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#include "hardware.h"
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static int mx27_suspend_enter(suspend_state_t state)
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{
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u32 cscr;
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switch (state) {
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case PM_SUSPEND_MEM:
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/* Clear MPEN and SPEN to disable MPLL/SPLL */
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cscr = imx_readl(MX27_IO_ADDRESS(MX27_CCM_BASE_ADDR));
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cscr &= 0xFFFFFFFC;
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imx_writel(cscr, MX27_IO_ADDRESS(MX27_CCM_BASE_ADDR));
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/* Executes WFI */
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cpu_do_idle();
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static const struct platform_suspend_ops mx27_suspend_ops = {
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.enter = mx27_suspend_enter,
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.valid = suspend_valid_only_mem,
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};
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static int __init mx27_pm_init(void)
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{
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if (!cpu_is_mx27())
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return 0;
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suspend_set_ops(&mx27_suspend_ops);
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return 0;
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}
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device_initcall(mx27_pm_init);
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